motor testing

[Alan Quay]

Latest developments:

I connected the 3 thick wires, of the questionable motor, to the existing functional system, without disconnecting the hall sensors of the known working motor.

The questionable motor ticked and moved when i applied a little throttle. I then disconnected to avoid damage.

I think this is good news for the motor?

I also voltage tested the 3 thick wires from the questionable controller with throttle applied and got nothing across all combinations.

It could be the throttle but the working throttle has more wires for it's led power meter (green, orange, red leds).

I'll check for similar colours in the throttle wires.

Can i mimmick a throttle signal or open it and short the wires or something similar?

I think I'll get a new controller?

This is great news and will help a fledgling eco bike business.

I have plans to clean London air with foldable electric bikes which go on train, tube, tram and bus, when necessary.

Where abouts are you?

It's quite difficult to mimic the throttle, because most controllers do a check when started. A short or open circuit will be picked up, an d throttle signal disregarded until reboot.

Most throttles are supplied with 0 and 5v, and return 1-4v.

I'm in Devon.

 

[robl2k]

I'm now fairly sure it's 250w because it originally came from cyclotricity and their's are 250w.

 

[Alan Quay]

I also voltage tested the 3 thick wires from the questionable controller with throttle applied and got nothing across all combinations.

Your meter probably won't pick it up.

Its complex, but a brushless DC motor (BLDC) works with a current going backwards and forwards through three coils. Another way to say this is 3 phase, AC.

The phasing and frequency of the current is controlled by the controller in order to do what the commutator would be doing in a traditional DC motor.

 

[robl2k]

That's a lovely part of the country.
I went to an eco village nearby.